Using the Audio Track Mixer, you can apply changes to audio
tracks as a sequence plays back. You can instantly hear the results
of any changes you make. You can control the volume, pan, and mute
settings of a track or its sends. You can control all effect options
for track effects, including the bypass setting.

The Audio Track Mixer records the changes as track keyframes
in the audio tracks. It doesn’t make changes to the source clips.

Note:

It’s best to make adjustments to multitrack sequences
one track at a time. Ride the controls on one track while playing
a sequence. Then play it again from the beginning while riding the
controls on another track. The changes you made to the first track
are preserved if you set the track’s automation setting to Off or
Read.

Record changes to sound tracks

Each channel of the Audio track Mixer corresponds
to an audio track in the Timeline. You can use the controls in each
Audio Track Mixer channel to record changes to its corresponding
audio track. For example, to vary the volume level of clips in the
Audio 1 track, use the Volume slider in the Audio 1 channel of the Audio
Track Mixer.

In a Timeline panel or Audio Track Mixer panel,
set the current time to the point where you want to start recording
automation changes.

Note:

In the Audio Track Mixer, you can set the current time
at the top left corner of the panel.

In the Audio Track Mixer, choose an automation mode from
the Automation Mode menu at the top of each track you want to change.
To record changes, choose a mode other than Off or Read. (See Audio
Track Mixer automation modes)

(Optional) To protect the settings of a property during
the Write automation mode, right-click (Windows) or Control-click
(Mac OS) an effect or send and then choose Safe During Write from
the menu.

In the Audio Track Mixer, do one of the following:

To start automation, click the Play button in
the Audio Track Mixer.

To play the sequence in a continuous loop, click
the Loop button .

To play from the In point to the Out point, click
the Play In To Out button .

As the audio plays back, adjust the options of any automatable
property.

To stop automation, click the Stop button .

To preview changes, change the current time to the beginning
of your changes, and click the Play button

Preserve a track property while
recording an audio mix

You can preserve the settings of a property
while recording an audio mix, preventing a selected property from
being edited. It protects that property across all tracks in a sequence.

In the Effects And Sends panel for a track, right-click
(Windows) or Control-click (Mac OS) an effect or send and choose
Safe During Write from the menu.

Note:

Use the Audio Track Mixer to automate track properties
only, not clip properties. You can edit clip keyframes by selecting
the clip and using the Effect Controls panel or Timeline panel.

Audio Track Mixer automation modes

Automation modes are set in the menu at the
top of each track. For example, drag a track’s volume fader or pan
control during playback. When you replay the audio with the track’s
automation menu set to Read, Touch, or Latch, Premiere Pro plays
back the track with the adjustments you made. As you make adjustments
in channels of the Audio Track Mixer, Premiere Pro applies the changes
to their respective tracks by creating track keyframes in a Timeline
panel. Conversely, audio track keyframes you add or edit in a Timeline
panel set values (such as fader positions) in the Audio Track Mixer.

For
each audio track, the selection in the automation options menu determines the
track’s automation state during the mixing process:

Off

Ignores the track’s stored settings during playback. Off
allows real-time use of Audio Track Mixer controls without interference
from existing keyframes. However, changes to the audio track aren’t
recorded in Off mode.

Read

Reads the track’s keyframes and uses them to control the
track during playback. If a track has no keyframes, adjusting a
track option (such as volume) affects the entire track uniformly.
If you adjust an option for a track that’s set to Read automation,
the option returns to its former value (before the current automated
changes were recorded) when you stop adjusting it. The rate of return is
determined by the Automatch Time preference.

Write

Records adjustments you make to any automatable track settings
that aren’t set to Safe During Write, and creates corresponding
track keyframes in a Timeline panel. Write mode writes automation
as soon as playback starts without waiting for a setting to change.
You can modify this behavior by choosing the Switch To Touch After
Write command from the Audio Track Mixer menu. After playback stops
or a playback loop cycle is completed, the Switch To Touch After Write
command switches all Write mode tracks to Touch mode.

Latch

Identical to Write, except that automation doesn’t start
until you begin adjusting a property. The initial property settings
are from the previous adjustment.

Touch

Identical to Write, except that automation doesn’t start
until you begin adjusting a property. When you stop adjusting a
property, its option settings return to their previous state before
the current automated changes were recorded. The rate of return
is determined by the Automatch Time audio preference.

Set Automatch Time for Touch mode
and Read mode

When you stop adjusting an effect property
in Touch mode, the property returns to its initial value. This is
also the case while in Read mode if a keyframe exists for the affected
parameter. The Automatch Time preference specifies the time for
an effect property to return to its initial value.

Automating
audio changes in the Audio Track Mixer can create more keyframes than
necessary in the audio track, causing a degradation in performance.
To avoid creating unnecessary keyframes, thereby ensuring both quality
interpretation and minimal performance degradation, set the Automation
Keyframe Optimization preference. In addition to the other benefits,
you can edit individual keyframes much easier if they are assembled
less densely in the track.

Specify automated keyframe creation

Automating audio changes in the Audio Track
Mixer can create more keyframes than necessary in the audio track,
degrading performance. To avoid creating unnecessary keyframes,
thereby ensuring both quality interpretation and minimal performance
degradation, set the Automation Keyframe Optimization preference.
In addition to providing other benefits, this preference makes editing individual
keyframes easier because they are less densely arranged on the keyframe
graph. For information about the Linear Keyframe Thinning and Minimum
Time Interval Thinning options, see Audio
Preferences.